Mine-carriage and elevator automatic safety-brake.



v V G. VON DAAM.

MINE CARRIAGE AND ELEVATOR AUTOMATIC SAFETY BRAKE. APPLICATION FILED MAR. 18 1911.

1,016,} 14; Patented Jan.30,1912. ZSHEETS-SHEET 1.

x 8k El I G. VON DAAMk MINE CARRIAGE AND ELEVATOR AUTOMATIG SAFETY BRAKE.

APPLICATION FILED MA R. 18, 1911. 1',O16,1 14.

Patented Jan. 30, 1912.

2 SHEETS-SHEET 2.

GERRIT VON DAAM, OF SCRANTON, PENNSYLVANIA.

MINE-CARRIAGE AND ELEVATOR AUTOMATIC SAFETY-BRAKE.

Specification of Letters Patent.

Application filed March 18, 1911.

Serial No. 615,247.

This invention relates to an improvement in safety devices for elevators, the object of said invention being to provide a safety device which will effectually hold the car against movement, and which at the same time will operate without jarring the car.

Other objects and advantages will be apparent from the following description, and it will be understood that changes in the specific structure shown and described may bemade within the scope of the claims without departing from the spirit of the invention.

In the drawings: Figure 1 is a side elevation of the device, Fig. 2 a similar view partly in section, Fig. 3 a top plan view, Fig. a similar view partly in section, and, Fig. 5 a detailed view of one of the clutch members.

In the. drawings: 10 designates the elevator guides which are provided with the usual racks 12. The U-shaped structure 14. is secured to the top of the car, and is held in engagement with the guides by means of plates 15. Aspring pressed draw bar 16 is positioned centrally in the member 14, the elevator rope being'secured to the portion 16 of said bar, said rope holding said bar against the tension of the spring 17. The end portion of the bar 163 "has; pivotally secured thereto the links 18, the end portions of said links terminating in' yokes 19 through each of which extends a shaft 20 which is rotatably supported by a U-shaped member 21, said U-shaped member being secured to the member 14 by means of a bracket 22, which is rotatably supported by the structure 14. The yokes 19 have journaled therein the shafts 20 bearing the drive gears 23, a bodily swinging movement being imparted to said wheels by the movement of the links 18, said wneels being forced against the racks by the movement of the links.

Beveled gears 24 are mounted on the end.

portions of the shaft 20, said gears being in mesh with beveled gears' 25 arranged on "shaft-s 26 which are carried by each of the U-shaped members. The end portions of said shafts 26 are provided with the eccentries-27 which are adapted when rotated to grip the guide which is engaged by the gear 23.

It will be seen from the foregoing mat when the draw bar 16 is released, the spring 71 will force the links 18 downward, forcing the gears into engagement with the racks on the guides, thus revolving said gears 23, and in turn the shafts 20. As the shafts 20 revolve, the eccentrics 27 will be thrown into engagement with the elevator guides by means of the shafts 26, the beveled gears which are positioned on the same having a rotary movement imparted'to them through the beveled gears on the shafts 20. This will positively lock the car against downward movement.

The many advantages of a construction of this sort will be .clearly apparent, particular attention being called to the peculiar manner of operating the eccentrics and the particular way'in which the same are supported by the superstructure 14:.

It will be seen that the entire operating mechanism is pivotally supported by the superstructure 14:, being instantly thrown into engagement with the guide bars as soon as the draw bar is forced downward through the medium of the spring 17.

What is claimed is:

1. The combination with an elevator car having a supporting elevator rope, of guides for the car and a safety device for said car including gear wheels, a spring for pressing the gear wheels into engagement with the elevator guides upon breaking of the elevator rope, and cam members forced into gripping engagement with the elevator guides by the rotation of the gears caused by the descent of the elevator car.

:2. The combination with an elevator car, of a yoke supported by the car, a spring pressed draw 'bar extending through the transverse bar of said yoke, links pivotally supported by the end portion of said draw bar, a plurality of brackets pivotally supported by the vertical beams of said yoke, shafts supported by said brackets, gears mounted on certain of said shafts, elevator guides formed with rack portions, said gears being ad'aptedto engage the racks formed on the'elevator guides, and a plu-- Patented J an, 30, 1912.

rality of eccentrics secured on the other shafts and arranged to engage the sides of said guides.

3. The combination with an elevator car,

of a yoke supported by the car, a spring pressed draw bar, links pivotally supported by said draw bar, a plurality of brackets pivotally supported by said yoke, each of said brackets consisting of a plurality of yokes, shafts passing through the end portions of said yokes, a shaft passing through the central portion, said shafts being geared together, and means carried by said shafts to stop the car.

4. The combination with an elevator car having a supporting elevator rope, of guides therefor having inner rack faces, gear Wheels carried by the elevator car and adapted to mesh with the said racks, a spring for pressing the gears into ""hing 20 position, connections between the and elevator rope for normally holding the gears out of mesh, eccentrics rotatably mounted adjacent the gears, and connections between the gears and the eccentrics for rotating the 25 eccentrics and forcing the same into clamping engagement with the elevator guides upon rotation of the gears.

In testimony whereof I afiix my signature, in the presence of two Witnesses.

onnnrr VON DAAM. Witnesses MARY V. WALSH, H. D. MILLER. 

